Missouri
Washington County drinking water quality
41 active public water systems serve 9,169 people in Washington County. 15 are compliant, 26 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.
Community water systems
11 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Potosi PWS Potosi |
2,527 | 2 | 1 | |
|
Potosi East |
900 | 0 | 0 | |
|
Washington County Pwsd 1 |
503 | 2 | 0 | |
|
Irondale PWS Irondale |
420 | 2 | 0 | |
|
MO American Rogue Creek Utilities |
276 | 0 | 0 | |
|
Mineral Point PWS Mineral Point |
231 | 3 | 1 | |
|
Anthonies Mill Resort Subdivision |
214 | 1 | 1 | |
|
Washington County Pwsd 2 |
175 | 2 | 0 | |
|
Caledonia PWS Caledonia |
130 | 2 | 1 | |
|
Spring Lake Subdivision |
45 | 0 | 0 | |
|
The Legacy Ranch |
25 | 0 | 0 |
Non-community systems (30: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (35, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Missouri records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.